Novel combination of zero-valent Cu and Ag nanoparticles @ cellulose acetate nanocomposite for the reduction of 4-nitro phenol

Khan, Farman Ullah; Asimullah,; Khan, Sher Bahadar; Kamal, Tahseen; Asiri, Abdullah M.; Khan, Ihsan Ullah; Akhtar, Kalsoom

doi:10.1016/j.ijbiomac.2017.04.062

Cited by 122 publications

(24 citation statements)

References 34 publications

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“…Therefore, an effective method is required for the removal of these contaminants from the natural environment . Reduction of carcinogenic and bio‐refractory pollutants like nitroarene and azo dyes by NaBH 4 in the presence of metal nanoparticles is a new, rapid and efficient technique for their removal from wastewater …”

Section: Introductionmentioning

confidence: 99%

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Ismail

Khan

et al. 2019

Applied Organom Chemis

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Ginger rhizome powder was used for the synthesis of supported metallic nanoparticle catalysts. A simple and novel adsorption method was used for the synthesis of silver nanoparticles loaded on ginger powder (Ag/GP), copper on ginger powder (Cu/GP) and nickel on ginger powder (Ni/GP). Among these, Ag/GP showed selective reduction of methyl orange and was used for further reactions. The prepared nanomaterials were characterized through X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy. The prepared Ag/GP catalyst was employed in the catalytic reduction of 4-nitrophenol (4-NP), 2-nitrophenol (2-NP), rhodamine B, methyl red and congo red. Ag/GP showed excellent catalytic reduction activity, the rate constants being 1.26 × 10 −3 and 2.38 × 10 −3 s −1 for 2-NP and 4-NP, respectively.The turnover frequency reached 1.06 min −1 for 2-NP and 1.16 min −1 for 4-NP when using the Ag/GP catalyst. The prepared Ag/GP catalyst demonstrated outstanding activity for the degradation of a mixed solution of dyes. Also, stability and reusability of the prepared catalyst were investigated, which showed outstanding reusability up to five times and was stable up to five days. KEYWORDS dye reduction, green synthesis, pseudo first-order kinetic, reusability and stability of catalyst, turnover frequency

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Section: Introductionmentioning

confidence: 99%

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Ismail

Khan

et al. 2019

Applied Organom Chemis

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“…Khan et al. have reported a catalytic reduction procedure to convert 4‐nitrophenol into 4‐aminophenol by Cu and Ag nanoparticles attached to cellulose acetate . The detailed mechanism of this often used model reaction has been solved recently .…”

Section: Applications For Functionalized Cellulosementioning

confidence: 99%

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Bethke

Palantöken

Andrei

et al. 2018

Adv Funct Materials

217

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As the most abundant natural polymer, cellulose presents a unique advantage for large-scale applications. To fully unlock its potential, the introduction of desired functional groups onto the cellulose backbone is required, which can be realized by either chemical bonding or physical surface interactions. This review gives an overview of the chemistry behind the state-of-the-art functionalization methods (e.g., oxidation, esterification, grafting) for cellulose in its various forms, from nanocrystals to bacterial cellulose. The existing and foreseeable applications of the obtained products are presented in detail, spanning from water purification and antibacterial action, to sensing, energy harvesting, and catalysis. A special emphasis is put on the interactions of functionalized cellulose with heavy metals, focusing on copper as a prime example. For the latter, its toxicity can either have a harmful influence on aquatic life, or it can be conveniently employed for microbial disinfection. The reader is further introduced to recent sensing technologies based on functionalized cellulose, which are becoming crucial for the near future especially with the emergence of the internet of things. By revealing the potential of water filters and conductive clothing for mass implementation, the near future of cellulose-based technologies is also discussed.not suitable for drinking water treatment in rural areas or not applicable on a large scale. Other methods involving materials which have high adsorption capacities for pollutants, for example activated charcoal have been explored. [27,28] Nevertheless, there are no universal adsorbents for all pollutants, meaning that superior alternatives are still required. In recent years, biodegradable adsorbents such as cellulose and chitosan have attracted much attention for the removal of heavy metals.In particular cellulose has a number of advantages, which include high abundance, low cost, easy access, nontoxicity and biodegradability. It is particularly suited for the removal of low concentrations of heavy metals which occur in contaminated ground or tap water. [26] Beyond the aspects of copper removal from water, in this review we indicate how the metal's increased toxicity for microbial life can present an advantage for medical applications. Moreover, we also take a closer look at further applications of functionalized cellulose, including catalysis and sensing, which can make a great impact regarding energy conversion and management. The inclusion of conductive cellulose sensors within the internet of things global network is of particular interest, since an accurate weather forecast can provide swift adjustments in the usage of the often intermittent renewable energy sources. In order to understand what confers functionalized cellulose its versatility for broad applications, we first exemplify the functionalization techniques on a molecular basis.

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“…Even though the yield of compound 7 was moderate, which could be due to the lower incorporation of Cu and its predominant distribution on the surface of the BNC, this opened the room for the further optimisation study. Previously, copper nanoparticles were efficiently loaded on the surface of pure cellulose acetate and showed remarkable catalytic properties for the reduction of 4-nitro phenol [16] while copper nanoparticles were also successfully generated inside cellulose matrix using Terminalia catappa leaf extract [47].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Production of bacterial nanocellulose (BNC) and its application as a solid support in transition metal catalysed cross-coupling reactions

Jeremić

Djokić

Ajdačić

et al. 2019

International Journal of Biological Macromolecules

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Please cite this article as: S. Jeremic, L. Djokic, V. Ajdačić, et al., Production of bacterial nanocellulose (BNC) and its application as a solid support in transition metal catalysed cross-coupling reactions, International Journal of Biological Macromolecules, https://doi. AbstractBacterial nanocellulose (BNC) emerged as an attractive advanced biomaterial that provides desirable properties such as high strength, lightweight, tailorable surface chemistry, hydrophilicity, and biodegradability.BNC was successfully obtained from a wide range of carbon sources including sugars derived from grass biomass using Komagataeibacter medellinensis ID13488 strain with yields up to 6 g L -1 in static fermentation. Produced BNC was utilized in straightforward catalyst preparation as a solid support for two different transition metals, palladium and copper with metal loading of 20 and 3 weight %, respectively. Sustainable catalysts were applied in the synthesis of valuable fine chemicals, such as biphenyl-4-amine and 4'fluorobiphenyl-4-amine, used in drug discovery, perfumes and dye industries with excellent product yields of up to 99%. Pd/BNC catalyst was reused 4 times and applied in two consecutive reactions, Suzuki-Miyaura cross-coupling reaction followed by hydrogenation of nitro to amino group while Cu/BNC catalyst was examined in Chan-Lam coupling reaction.Overall, the environmentally benign process of obtaining nanocellulose from biomass, followed by its utilisation as a solid support in metal-catalysed reactions and its recovery has been described. These findings reveal that BNC is a good support material, and it can be used as a support for different catalytic systems.

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Novel combination of zero-valent Cu and Ag nanoparticles @ cellulose acetate nanocomposite for the reduction of 4-nitro phenol

Cited by 122 publications

References 34 publications

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Production of bacterial nanocellulose (BNC) and its application as a solid support in transition metal catalysed cross-coupling reactions

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